Automatic magnetic circuit-breaker



No. 6I9,09I. Patented Feb. 7, I899. W M. SCOTT.

AUTOMATIC MAGNETIC CIRCUIT BREAKER.

(Application filed Jan. 28, 1898.) (No Model.) 3 Sheets$heet I.

WITNESSES: INVENTOR 6 7 m WwaQb Q No. 6l9,09l. Patented Feb. 7, I899. W. M. SCOTT.

AUTOMATIC MAGNETIC CIRCUIT BREAKER.

(Application filed Jan. 28, 1898.)

(No Model.)

3 Sheets-Shaet 2.

WITNESSES: INVENTOR m: NORRIS PETERS co. mow-umq, WASHINGTON, n. c.

(N'o Modei.)

w. M. scoTT.

AUTOMATIC MAGNETIC CIRCUIT BREAKER.

(Application filed Jan. 88, 1898.)

m: ponms PETERS co Pnom-Lrmo, wAsmNcnon. u. u.

Patented Feb. 7, I899.

3 Sheets-Sheet 3,.

IN VEN TOR A 7770/?NE r,

UNITED STATES PATENT OFFICE.

IVILLIAM M. SCOTT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE CUTTER ELEOTRIOALAND MANUFACTURING COMPANY, OF NEW JERSEY.

AUTOMATIC MAGNETIC CIRCUIT-BREAKER.

SPECIFICATION forming part of Letters Patent No. 619,091, dated February 7, 1899.

Application filed January 28, 1898. Serial No. 668,290. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM M. Scorr, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia, State of Pennsylvania, have invented a certain new and useful Automatic Magnetic Circuit- Breaker, of which the following is a specification.

My invention relates to automatic magnetic 1o circuit breakersg and the object of my improvements is to afford means of automatically opening the circuit upon the occurrence of a predetermined above or below normal flow of current. I attain this object by the I 5 mechanism illustrated in the accompanying drawings, in Which Figure 1 is a front view of my device. Fig. 2 is a side view of same. Fig. 3 is a detail side view of the latch and the parts adjacent,

showing the latch adapted to restrain the separating means independent of the movable contacts. Fig- 4 is a rear view of same in part section. Fig. 5 is a diagrammatic view of the paths of the current.

Similar numerals refer to similar parts throughoutthe several views.

Numeral 1 indicates the base upon which my device is mounted. The solenoid 2 is provided with a movable core 4, which is adapted upon a predetermined flow of current to actuate the latch 5 to release the switches or movable contacts 3, which are thereupon adapted to be separated from their stationary contacts 15 by the spring-actuated piston 16.

The electromagnet 6 is provided with an armature 12, pivoted to the frame 7 and pivotally movable thereon to permit the accommodation of the plane of its contact-surface to the plane of the contact-surface of the polepiece of the magnet. Frame 7 is pivoted to latch-pivot 14 and is provided with spiral springs 13, adapted to cause the separation of the armature from the electromagnet '6 upon the interruption or below normal flow of cur- 4.5 rentthrough the said magnet. The cross-piece 8 upon said frame 7 is adapted to encounter and actuate the latch 5 to permit the separation of the movable from the fixed contacts, as above described. The spring-piston 11 is connected with one terminal of the coil of the electromagnet 6, as shown in Fig. 5. This piston has a limited movement and is adapted to be in electrical contact with one of the movable contacts 3 when these are in contact with their respective stationary con tacts and to be separated from same before the said movable contacts have separated from their stationary contacts to eifectthe cutting out of circuit the electromagnet 6 before the opening of the circuit-breaker. The yoke 19, which is secured to the free ends of the movable contacts 3, has mounted upon it a'handle 10, upon which is pivoted the lever 9, adapted by manual pressure in the operation of closing the switch to encounter the armature 12 and force it against the polepiece of the electromagnet. Upon Withdrawing the hand from the lever 9 the lower part is adapted to fall away from the armature and leave it free to separate from the electromagnet upon the interruption or below normal flow of current through the said magnet, as above described.

In Figs. 3 and 4: the'latch 5 is shown as engaging with the spring-actuated piston 16 instead of the frame of the movable contacts, as shown in Figs. 1 and 2, in which case the forcing of the movable contacts into contact with the fixed contacts serves to force the spring-actuated piston 16 into engagement with the latch '5, and the movable contacts are adapted to remain in engagement with the fixed contacts by the friction between them so long as the spring-actuated piston 16 is restrained by the latch 5. The said latch 5 in this case-that is, as shown in Figs. 3 and 4is composed of two members, each of similar shape as latch 5 shown in Figs. 1 and 2. These two members are adapted to flank the sides of the spring-actuated piston 16 and are provided with the cross-piece 18, adapted to receive the thrust of the movable pin 20. The cross-piece 21 is adapted to engage with the projection 22 in piston 16. The projections 17 on the piston 16,which project through slots 28 in the cylinderof piston 16,are adapted to receive the blow of the upper legs of latch 5 to assist in the actuation of piston 16. In

other respects the operation of the latch is similar to that above described.

XVhat I claim as my invention, and desire to secure by Letters Patent, is

1. In an automatic magnetic circuit-breaker having fixed and movable contacts, in combination with means for eftectin g the separation of the movable contacts from the fixed contacts, means of restraining the operation for the said separating means until actuated to permit the same, means for actuating the restraining means,and an electromagnet and armature for controlling said actuating means during predetermined fioW of current through the magnet, and automatic means for cutting out of circuit the coil of the electromagnet after the actuation of the restraining means and before the separation of the fixed and movable contacts.

2. In an automatic magnetic circuit=breaker having fixed and movable contacts, in combination with means for eifecting the separation of the movable contacts from the fixed contacts, means for restraining the operation of the said separating means until actuated to permit the same, an electromagnet and armature the pivoted frame supporting said armature adapted upon the release of said armature by the magnet to actuate said restraining means and automatic means for cutting out of circuit the coil of the electromagnet after the actuation of the restraining means and before the separation of the fixed and movable contacts.

3. In an automatic magnetic circuit-breaker having fixed and movable contacts, in combination with means for eifectin g the separation of the movable contacts from the fixed contacts, means for restraining the operation of said separating means until actuated to permit the same, means for actuating the restraining means, and an electromagnet and armature for controlling said actuating means during predetermined flow of current through the magnet, and a pivoted lever adapted to be manually operated to force the armature into engagement with the poles of the magnet, substantially as described.

at. In an automatic magnetic circuit-breaker having fixed and movable contacts, in combination with means for effecting the separation of the movable contacts from the fixed contacts, means for restraining the operation of said separating means until actuated to permit the same, means for actuating the restraining means, and an electromagnet and armature for controlling said actuating means during predetermined flow of current through the magnet, said armature pivoted to a supporting-frame and having a pivotal movement thereon to permit the accommodation of the plane of its contact-surface to the plane of the contact-surface of the pole of the magnet.

5. In an automatic magnetic circuit-breaker having fixed and movable contacts, means for effecting the separation of the movable contacts from the fixed contacts, means for restraining the operation of said separating means until actuated to permit the same, an electromagnet and armature, said armature pivoted to a pivoted spring-actuated supporting-frame and having a pivotal movement thereon to permit the accommodation of the plane of its contact-surface to the plane of the contact-surface of the pole of the magnet, said armature-frame adapted upon the release of the armature by the magnet to actuate the said restraining means to permit the operation of said separating means.

IVILLIAM M. SCOTT.

lVitnesses:

JNo. Sroxns ADAMS, E. F. GRACE. 

